Chocolate Pinwheel Cookies

Ingredients

• 4 ounces Ghirardelli 60% Cacao Bittersweet Chocolate Baking Bar
• 3 tablespoon Ghirardelli Unsweetened Cocoa
• 3 cups all-purpose flour
• 1/2 teaspoon salt
• 1/4 teaspoon baking soda
• 1 1/4 cups unsalted butter, at room temperature
• 1 1/4 cups white granulated sugar
• 1 large egg
• 1 1/2 teaspoons pure vanilla extract
• 1 teaspoon instant espresso powder
• 2 tablespoons boiling water